Fans, idol and social media have jointly constituted a strong social field. With strongly or weakly connected platforms, fans participate in the construction of online communities, presenting different group performances at different interactive stages, and obtaining different emotional experience. This phenomenon accords with the dynamic development logic of the anthropologist Victor Turner, but it also exposes the lack of explanation of the structural functionalism framework in our post-modern Chinese society, so we further introduces Collins’s experiential concept of Emotional Energy. Therefore, this paper’s strategy is to combine the above two perspectives to observe the evolution of Emotional Energy in both structural daily and anti-structural stage from microscopic dimension of individual feelings. We take an online fan community of Yibo Wang and Zhan Xiao called “brothers love me” as a typical example. Based on the qualitative analysis of the virtual community’s construction process, we try to build a dynamic mechanism model which can explain the change of Emotional Energy’s aggregation, formation and attenuation, and establish a logical relationship among strongly/weakly connected platforms, Emotional Energy and Structure/ Anti-Structure. This model is also applicable to other network communities that naturally form from weak to strong.